• Dilpreet Kaur
• Er. Rajanpreet Kaur

In certain scenarios, the CCI may seriously degrade the system performance, and therefore should be avoided or mitigated. The interference conditions in a femto-cell network greatly depend on the access mode used by the femto-cell network. Closed-access and open-access are two different access options commonly used by femtocells. In the closed access mode, the macro-cell user equipment’s (MUEs) that may join a particular femto-cell are restricted to a certain group, while all MUEs are allowed to make hand-off to femto-cells without any restriction for the open access mode. Even though interference problems may be greatly resolved with the open access operation, there may be some other problems such as privacy issues, extra burden on the backhaul of a femto-cell’s owner etc. On the other hand, for the closed access mode, there may be scenarios where the interference reaches at intolerable levels. In order to overcome this issue of interference with macro users, variable power control algorithms are needed. In this work, we have presented four algorithms on group priority-based power transmission of femto cells in order to provide quality of service. First algorithm uses fixed home evolved NodeB (HeNB) power throughout whole process, second algorithm uses effective power control based on interference measure from macro-NodeB and third uses home evolved NodeB power-control depending upon home evolved NodeB and macro-cell user equipment’s (MUEs) path losses such that home user is allocated to one of the three groups ( low-mid-high throughput) having different target throughput needs as far as their power necessity is fulfilled in order to delivery of desired traffic loads. The fourth algorithm uses combination of all three depending upon interferences changes i.e., if the femto cell is in the boundary of hexagon (macro cell) it uses fixed power but as it goes towards the center, it starts using the other two algorithms as well. Simulation has been carried out on number of test cases by varying the quantity of macro and femto cells as well as varying number of femto and macro users. In among all the algorithms, presented hybrid algorithm works effectively as it can chose any algorithm depending upon the locality of femto cells in the topology i.e., its choses algorithm three when femto cell is nearest to center of macro cell polygon in which least power is required and when it is near boundary it uses algorithm three (more power) to mitigate the interference with that of macro cell.

Femto cells, 5G networks, interference, LTE, power consumption

"Adaptive power control scheme to mitigate cross cell interference in Macro-Femto small cell networks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 3, page no.2185-2195, March-2021, Available :http://www.jetir.org/papers/JETIR2103271.pdf

"Adaptive power control scheme to mitigate cross cell interference in Macro-Femto small cell networks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 3, page no. pp2185-2195, March-2021, Available at : http://www.jetir.org/papers/JETIR2103271.pdf